Cool. When I've looked at those they seem decent, but more expensive than putting similar spec'd equipment in co-location (with Hetzner) and let it depreciate over a bunch of years.
Sure. Keeping things to round figures for simplicity. :)
Lets say you buy a given Dell server for US$10k.
If you plan to run that server over (say) 5 years then you can effectively consider the hardware cost to be ~US$2k per year.
As a lot of enterprise flash drives are rated for 5 years, that's a decent baseline.
(and for the stuff I do, the drives are only lightly loaded so they'll last much longer)
Then it becomes a matter of comparing the yearly cost of your configuration to the Hetzner provided ones.
And if you're patient and know what you're doing (ie build your own servers), you can get some end-of-year model (and similar) servers with lots of memory and storage for "fairly" cheap compared to sticker price.